Breadcrumbs keep spontaneously disappearing and I’m losing my mind
In my Drupal 10’s site breadcrumb trails, I noticed that my nodes were only displaying the top-level node and the current node, despite being several levels deep in the menu navigation. So, for example, a node four levels deep:
Top-level Node > Second-level Node > Third-level Node > Current Node
Will only show the top and current node in the breadcrumb:
Top Level Node > Current Node
The only thing that will get the breadcrumb to show correctly is if I make a brand new node to replace the top-level node and then move the other nodes one at a time underneath it via each node's node edit page (moving things in the menu editor doesn't help).
This seems to be ok for a while... and then some unknown action triggers all of the breadcrumbs within the current menu trail to vanish while I’m not paying attention!
This site hosted on Pantheon. For those familiar with Pantheon, this is a multidev clone of another site whose breadcrumbs are working fine. After making the multidev clone, I changed some content before I noticed that the breadcrumbs were misbehaving.
Any troubleshooting ideas would be of great help! Google and ChatGPT just lead me in circles.